Simulation of an Urban Infrastructure under Extreme Loads through a Network of Interactive Physical and Numerical Components

该研究计划的目标是开发一种模拟方法，通过交互式物理和计算模型网络，可以评估关键城市基础设施的弹性。对于这样的模拟，重要的是要逼真地模拟系统的每个组件。此外，组件之间的交互需要在系统级模型中适当地表示。虽然许多独特的计算或实验方法已被用于详细研究的组件，它仍然是具有挑战性的，以整合这些组件，以建立一个系统模型。因此，城市基础设施，如遭受地震的地下结构和遭受地震或火灾的建筑物或桥梁，已经用大量的假设和近似进行了研究。为了应对这一挑战，PI的研究小组开发了集成仿真方法，其中不同分析平台中的各种数值模型或地理分布测试设施中的物理样本可以集成到一个系统模型中。 建议的研究计划是扩展集成模拟方法，使其可以应用于评估典型的城市基础设施，如地下结构（地铁隧道和天然气管道）和建筑结构遭受地震或火灾。该研究计划将建立在PI在混合模拟方法和PI小组在过去五年中开发的独特实验装置方面的专业知识基础上。该研究计划包括五个研究项目：1）使用UT 10混合模拟器评估带有支撑或附加阻尼器的多层建筑物的回弹性，2）使用混合柱试验机评估钢筋混凝土结构的抗震性能，3）开发用于火灾结构的混合模拟方法，4）地下结构和管线的混合模拟方法的开发; 5）多动态子系统的集成方法的开发。 该研究计划将以多种方式影响社会。模拟方法将导致对承受极端负荷的城市基础设施的复原力进行现实的评估，这将指导应急准备和政策制定。从长远来看，PI设想该研究计划将导致建立城市基础设施模拟中心。其次，该研究计划将培训高级建模和模拟方法领域的HQP。HQP将对构成城市基础设施的组成部分的行为以及它们如何相互作用形成坚实的理解。此外，HQP将有机会与国际合作者和行业合作伙伴互动，通过他们可以发展全球和实用的观点。

The objective of the research program is to develop a simulation method with which the resilience of critical urban infrastructure can be evaluated through a network of interactive physical and computational models. For such simulations, it is important to realistically model each component of the system. Moreover, the interaction between the components needs to be properly represented in a system level model. While many unique computational or experimental methods have been used to investigate the components in detail, it is still challenging to integrate such components to build a system model. Thus, the urban infrastructure, such as underground structures subjected to earthquakes and buildings or bridges subjected to earthquakes or fire, have been studied with a large number of assumptions and approximations. To address the challenge, the PI's research group has developed the Integrated Simulation Method in which diverse numerical models in different analysis platforms or physical specimens in geographically distributed testing facilities can be integrated into a system model. The proposed research program is to extend the Integrated Simulation Method such that it can be applied to the assessment of typical urban infrastructure such as underground structures (subway tunnels and gas pipelines) and building structures subjected to earthquakes or fire. The research program will be built upon the PI's expertise in the hybrid simulation method and the unique experimental apparatus that has been developed by the PI's group in the past five years. The research program consists of five research projects: 1) evaluation of the resilience of multi-storey buildings with braces or supplemental dampers using the UT10 Hybrid Simulator, 2) evaluation of the seismic performance of reinforced concrete structures with the Hybrid Column Testing Machine, 3) development of a hybrid simulation method for a structure on fire, 4) development of a hybrid simulation method for underground structures and pipelines, and 5) development of an integration method for multiple dynamic subsystems. The research program will impact the society in several ways. The simulation method will lead to realistic assessments of the resilience of urban infrastructure subjected to extreme loads which will guide emergency preparedness and policy development. In the long term, the PI envisions that the research program will lead to an establishment of a Simulation Centre for Urban Infrastructure. Secondly, the research program will train HQPs in the area of advanced modelling and simulation methods. The HQPs will develop a solid understanding of the behaviour of components that constitute urban infrastructure and how they interact with each other. In addition, the HQPs will have opportunities to interact with international collaborators and industry partners through whom they can develop global and practical perspectives.